A Three Way Feeling:
When your Sim feels hungry, give it some food. Then, after it is done eating, it will have to go to the bathroom. After it is done going to the bathroom, it will lose Hygiene points. Make sure the Sim washes its hands. Afterwards, the cycle will start again after you go to the bathroom; it will be hungry again.

Easy money:
Build up your Creativity then paint and sell paintings. Once you Creativity is all the way up you will earn 500 Simoleons for each painting.